Japanese telecommunications and internet company SoftBank announced Friday that it is partnering with Saudi Arabia to launch a technology investment fund that may manage as much as $100 billion. Saudi Arabia&rsquo;s Public Investment Fund (PIF) &mdash; the country&rsquo;s top sovereign wealth fund &mdash; may invest up to $45 billion over the next five years in the new fund, tentatively named the SoftBank Vision Fund,&nbsp;while SoftBank will put in nearly $25 billion.